Crikey, on 21 January 2013 - 02:52 PM, said:
What, this one to explain "Jigsaw walls"?-
"if you live in an earthquake zone, and you have no mortar, (you know coz aliens never thought of the sticky stuff... that man finally come up with), and you build with polygonal masonry, this means, usually, that you can remove any base or mid stone, from the structure and the wall or structure will not collapse, hence why they interlocked the stones.. simple really."
It's an interesting theory, but has it been tested? For example have scientists built a small-scale copy of the wall and then subjected it to a simulated earthquake in laboratory conditions to see if it holds up or collapses?
I never looked up if it had been tested. I guess if large parts are in ruin but the walls are not - that may be the proof. The post Id hoped you read was Post #5438 on page 363....as well as visit the various links there, then you'll find PP style walls are not new at all
anyway this may help
quote: " Dr.Ramis describes these as "a complex mesh of many interwoven arches. Take a second look at the Corfu wall and you can now trace arches everywhere. Dr.Ramis further explains that "in a well built marge, most stones are surmounted by an irregular arch of other stones - and are themselves elements in one or more other arches."
"With rectangular coursed stonemasonry,
if a stone is taken out of the wall, a natural corbelled arch is formed by the stones in the courses above it. With polygonal masonry, what you get is a true arch formed by 3 or more stones. The wall would not even notice the missing stone since the arch will be in tension. Because the ground under a wall tends to subside here and there over time, especially after heavy rains, the arches embodied in the wall enter into tension. Hence a polygonal wall can withstand these movements better than a rectilinear wall due to its inherent tensile strength."
In a polygonal wall "the stones are placed vertically instead of horizontally. In the event of the foundation sinking, the stones adjust, find new positions, obey gravity, work like wedges; tensile strength is not lost. In a horizontally coursed wall, a subsiding foundation immediately causes a loss of tensile strength that can never be regained."
"The arch is one of the strongest and most efficient building forms of all times, so it is not surprising to find they are integral to this walling system….
It is no wonder that in… areas subject to earthquake, a polygonal wall system evolved."
Edited by seeder, 21 January 2013 - 04:19 PM.
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